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  4. When a body moves in a circular path, no work is done by the force, since

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Q. When a body moves in a circular path, no work is done by the force, since________

AP EAMCETAP EAMCET 2020

Solution:

When a body moves in a circular path, then centripetal force is always directed towards centre of circular path. Hence, centripetal force and displacement (directed tangentially) are perpendicular to each other.
$\therefore $ Work done
$W=F s \cos 90^{\circ}=0\left[\because \cos 90^{\circ}=0\right]$